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Multidetector-row CT coronary angiographic finding of myocardial bridging

¹ Department of Radiology, ² Department of Cardiology, Dongsan Medical Center, Keimyung University, Daegu, Republic of Korea

View larger version (95K): [in this window] [in a new window]   Figure 1. A 44-year-old man with myocardial bridging. (a) A curved multiplanar reformation image demonstrates the course of the mid-left anterior descending coronary artery (LAD) (arrow) dipping into the myocardium, corresponding to myocardial bridging. (b,c) Short-axis maximum intensity projection images clearly depict a segment of the LAD surrounded by myocardium (arrow). The diameter of the tunnelled segment is 2.2 mm at end-systole (b) and 2.9 mm at end-diastole (c), indicating systolic compression of the segment. (d) A volume-rendered image provides an excellent demonstration of myocardial bridging (arrow).

View larger version (103K): [in this window] [in a new window]   Figure 2. A 65-year-old woman with myocardial bridging. On conventional angiography, the lumen of the segment of the mid-left anterior descending coronary artery (LAD) (arrow) is compressed by myocardial contraction in the systolic phase (a) but recovers its normal diameter in the diastolic phase (b). (c) A curved multiplanar reformation image demonstrates the significantly stenotic tunnelled segment of the mid-LAD (arrow). (d) The volume-rendered image clearly reveals myocardial bridging (arrow) in the mid-LAD.